While engaged in back door intercourse, your female partner expels moist dirty air from her anus causing a freckle effect upon your abdomen and lower torso resembling leopard spots. Hence THUNDERCAT!!
Jason was banging Michele doggie style last Saturday night after she had a bad sammich. Michele got so worked up she dusted him with a Thundercat.
by Hotpiswhisker March 5, 2019
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Thundercat: the youngest people in a group
"Shall we invite the Thundercats to my mate Daves patry?"

"Nah they know nothing about Led Zep, best leave the Thundercats at home"
by Stoling Rone March 21, 2010
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Thundercats was an American animated television series developed by Rankin/Bass. It aired 1985-1990 & then had a run on cable television's Cartoon Network 1997-2002. Thundercats were a race of cat-like humans, each named according to what type of cat it represented: Liono was lion-like, Cheetarah was cheetah-like, Pumara was puma-like, etc... They were from a planet called "Thundera" which was destroyed. Only a handfull of their race survived & travelled to a new planet they called "New Thundera", but it was also sparsely populated by half animal, half man creatures such as beastman, monkeyman, hyenaman, etc... The thundercats arch nemesis however, was an evil humanoid mummy called "Mum-ra". Their catch-phrase was "Thundercats, HO!"
As in: "Remember that Thundercats cartoon from the 80's? I thought it was pretty cool back then."
by Jimmy Freakin Neutron August 7, 2006
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An act done upon some poor unsuspecting male. A person approaches from behind, and uppercuts between their legs with their thumb, pointer, and middle fingers all straight up in a triangle pattern, making sure the thumb contacts the butthole, and the pointer and middle finger pokes both testicles. All while shouting "THUNDERCAAAAAAAAAAT!" as loudly as possible.
Tom rolled on the ground for nearly 20 minutes after Steve thundercatted him hard.
by Mike Bruens August 13, 2005
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The young person who always shows up to the party, but brings nothing to the table. He may start a fight for no good reason, or cheat in a chugging contest. Sometimes abbreviated "t-cat."
Look at Tyler's graphic button-down. Why is that thundercat trying so hard to be cool?
by J-Thunda May 24, 2009
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a person with a lot of women or hoes.
He got so many hoe's, he's a thundercat
by Godamonginsects November 29, 2003
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A woman that has passed the status of gold digger with no survival skills to make it on her own as a cougar.

A woman that attempts to turn a one-night stand into a lifetime commitment.

A ho trying to be a housewife.

Too much drinking, partying, and sex, at an early age causing a woman to age aggressively is a tell-tale sign.
A Cougar will buy you a drink; a Thundercat can't buy herself the time of day.

"Dude, if he takes that Thudercat home, she'll never leave."
by Kromen January 5, 2010
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